Gladys S. answered 09/03/20
ASVAB, Algebra, Geometry, and PreCalculus Tutor
Since <1 and <2 are vertical angles, we know that
m(<1 )= m(<2.) Therefore, we can solve the algebraic equation ( substituting the expressions for the angles):
6 *x + 11 = 10*x -9 ; subtract 10*x from both sides
-4*x + 11 -9 ; subtract 11 from both sides
-4*x = -20; ;divide by -4
x = 5
substituting x = 5 in the original expression we now have the value :
m (<1) = 6*x+11 = 6*5 + 11 = 41